Daily quest is given by the corresponding skill or lvl of the professional NPC, therefore a skill book will be rewarded from the quest. Once you receive the book, double click on it and your skill point will increase by 1.
Ex. if you are trainee, daily quests will be given by Fragoville Wicher
Furthermore, Witcher in Fragotown Craftmen union store, also gives you a special daily quest for collecting special resource item
needed by witchers called Witcher's Totem

1. Special resource quest from Wichter in Craftman's union store for the colloection of Witcher's totemQuest: To collect 3 Northern AshLocation: Norhthern Mountain, on its left borderReward:Witcher's Totem x5